Grinding-mill.



. 8?2,321- PATENTED D50. s, 1907/ w. B. ALLEN 6: w. BLALAGK. GRINDING MILL.

APPLICATION FILED AUG. 3, 1906.

NM K N. WjlliarrzflAlleiz WITNESSES; [NVENTORO A TTORNE Y5.

LFMCE.

WILLIAM'B.ALLEN AND WILLIAM BLALAOK, or PARsonsZ ansas;

1 enmnmamrnn.

Labetteand State of Kansas, have invented a low and useful Grinding-Mill, of which the -.-followi'ng is a specification.

Thisginvention relates to mills for grinding corn, cobs and the like and its object is to providea durable and efficient mill of this character having a grinding cylinder con,-

. structed. in a novel manner and cooperating with a concave of novel construction.

.Afurther object is to form both the cylin- ,der and concave ofsections any one of which can be removed in the event of wear or ;v breakage.

i A still further object is to provide a concave having openings between the teeth thereon through which the ground material is free to fall.

With the above and other objects in view the invention consists of a concave made up of a plurality of curved. bars having teeth upon their concave faces, said teeth extend-' ing laterally so that when the bars are assembled-a concave working face is formed madeu entirely of the series of teeth of the bars. penin-gs are formed between the teeth of each bar through which the ground material may fall.

Agrinding cylinder is rotatably mounted within the concave and is made up of a plurality of interlocking toothed rings supported in a novel manner upon a shaft.-

The invention also consists of certain other novel features of construction and combinations of parts which will be hereinafter more fully described and pointed out 40, in the claims.

In the accompanying drawings is shown 7, the preferred form of the invention.

In said drawings: Figure 1 is a longitudinal section through a portion of a cylinder and concave, parts of said cylinder and-concave belng also shown in elevation; Fig. 2

is a section on line mx Fig. 1; and Fig. 3 is a plan view ofa portion of one of the bars of the concave and showing the working or toothed face thereof.

Referring to the figures by characters of reference, 1 is a drive shaft mounted in suitable bearings 2 and having a desired number of spacing disks 3 keyed or otherwise secured thereon. These disks are surround ed by aseries of rings 4 having interior ribs Specification of Letters Patent. Application filed August 3. 1906- Sei'i'al No. 329,126.

Patented Dec. 3, 1907.

5 which are removed from the edges of. the rings .so that when said rings are assembled in the manner hereinafter described grooves 6 are formed within some of whichthedisks 3 areseated.. These disks are. adapted to be fastened within said grooves by means of keys .7 main. any other preferred manner. Each of the ringsy l has a plurality of teeth 8 extendingfroni its periphery, the outer ends ofsaid teeth being substantially llat while their'forward or advancing edges are concave andmerge into the straight rear face of the tooth in front thereof. ticular contour of the teeth is clearly shown in Fig. 2; Each ring has a circular grocve 9 arranged concentrically in one face ari a corresponding head 10 on its opposite face. A bridge 11 is formed across the groove 9 in each ring and this bridge is adapted to project between the. endsof the bead. 10 of the adjoining ring so that when all of the rings are assembled in contact it becomes impos sible for any of them to rotate independently of the others -The bridges 11 are so dis- The parposed that when the rings are assembled the teeth 8 are disposed out-of alinement as clearly shown in Fig. 2. In order that .the rings may betightly clamped together concave disks or heads 12 are feathered on the shaft 1 andfit within the end rings 4 and bear against the"ribsfi therein. Nuts 13 are screwed upon the shaft 1 and are adapted to bear against the heads 12 so as to clamp said heads against the ribs of the end rings.

The grinding cylinder which is made up of the rings 4 rotates within a concave consisting of a plurality of curved bars 14 having bosses 15 arranged upon opposite faces thereof and around alining openings 16 through which connecting rods 17 extend. The concave or working face of each bar 14. has two parallel series of similar teeth 18 alternately arranged and extending laterally from the bar. The teeth of the various bars are adapted to contact when said bars are assembled so that a toothed working face of considerable area is therefore produced. Spaces are formed between the teeth of each series as shown at 19. The bars 14 are not toothed throughout their len ths but the toothed portions thereof are but slightly remzrved from the teeth 8. The remaining portions of the bars extend is osed sub- .stantially concentric with the s aft 1 and inner faces and which are adapted to contact so as to produce a sinooth wall as shown at 21 in Fig. 1. This wall constitutes a continuation of a hopper 22 arranged upon a casing 23 adapted to inQlose the concave so as to receive material discharged therethrough.

It is thought that the operation of the mill will be fully understood. The grinding cylinder is rotated at a desired speedand the. 'eobs, corn or other gnaterial to be ground is made up of similar parts it is to be understood that the rings and bars can be made of dill'erent sizes and so assembled as to form a conical rotatable grinding element and a corresponding concave.

(.lonsideralilc ii'nportam-e is attached to the particular contour of the teeth By providing these teeth with flat outer faces in the manner shown the same can be ground many times without materially reducing the size of the cylinder. The outer ends or working f aces of these teeth may be hardened and instead 01 bevelmg the advanelng edges of these teeth as shown in Fi 1 said ed es may be straight across. Any suitable means, not shown, may be employed for ad usting. the bars 14 soas to properly fit around the grinding cylinder.

.lhe preferred form of the invention has been set forth 1n the foregoing descriptionbut we do not limit ourselves thereto as we are aware that modifications ma be made therein without departing, from t e spirit or sacrificing the advantages thereof, and we therefore reserve the right to make such changes as fairly fall within the scope of the claims.

What is claimed is:

A mill comprising a concave, and a revoluble grinding element mounted therein, said element comprising a shaft,- a plurality of toothed rings surrounding and out. of 0on tact with the shaft, each'of said rings having an annular groove in one face and an annular bead u on its opposite face, the' bead of each ring )eing disposed to project into the roove in the adjoining ring, each groove being intersected by a bridge disposed to project into the bead of the adjoining ring to prevent independent rotation of the rings,

an" interior annular rib integral with each ring, the ribs of said rings formlng annular-- grooves therebetween a spacing disk mic; the shaft-having its periphery seated wit one of said grooves, means engaging the disk and one of the ribs to prevent inde endent rotation of the disk and rings, eads upon the shaft hearing against the ribs of the end rings, and means for clamping the a heads against the rings to lock t e rings together, certain of said rings being su ported out of contact with the shaft by t e adjoining rings.

In testimony that we claim the foregolng as our own, we have hereto afiixed'our s1g-' natures in the presence of two witnesses.

WILLIAM B. ALLEN. WILLIAM BLALACK.

Witnesses:

J. D. Jones, ALICE (.ovAL'r. 

